有一类科幻小说以火星和金星这些地球的邻居为描写对象，并且提出它们怎样才能适合人类居住，而问题的答案就是建设行星。
THERE is a branch of science fiction that looks at the Earth’s neighbours, Mars and Venus, and asks how they might be made habitable. The answer is planetary engineering.
按照这个速度，第500颗行星可能在10月份公布，正好比另一个转折事件——第一颗可能适合人类居住的外行星的发现——晚一个月左右。
At that rate, no. 500 could be announced before October is out - just a month or so after another watershed moment, the discovery of the first potentially habitable alien planet.
近年来，对可能适合人类居住的太阳系外行星的探索，已取得了不错的进展。
In recent years, the search for potentially habitable planets outside our solar system has stepped up several gears.
近年来，对可能适合人类居住的太阳系外行星的探索，已取得了不错的进展。
In recent years, the search for potentially habitable planets outside our solar system has stepped up several gears.
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